Improvement in glass-furnaces



F. ROHRBACHER & F. HORMANN.

Improvement in GIass-Furnaces.

No. 130,154, PatentedA g. 6,1872.

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the pots, arranged in a circle on the bench a UNITED STATES PATENTQFFICE.

IMPROVEMENT m GLASS-FURNACES.

Specification forming part of Letters Patent No. 130,154, dated August6, 1872.

Specification describing an Improved Glass- Furnace, invented byFREnERIoK ROHRBACH- ER and FERDINAND HORMANN, both of the city andcounty of Philadelphia, State of Pennsylvania.

Improved Glass-Furnace.

laces and of causin a uniform and intense P 7 g heat to pervade thewhole interior of the furnace, and to preserve from injury the contentsofsuch pots as may be broken.

In the accompanying drawing, Figure 1 is a vertical section of aglass-furnace with our improvement; Fig. 2, a vertical section on theline 1 2, Fig. l; and Fig. 3, a sectional plan on the line 3 4, Fig. 1.

A is the base of the furnace; B, the circular wall of the same; D, theroof or dome; and E,

the nose 6 of each pot projecting into a Work ing hole, f, and theopening of each pot being furnished with a cover, 2'. On the outside ofthe glass-furnace is built a fire place, G, furnished with the usualgrate-bars H, this fireplace communicating, through a passage, h, andover a bridge-wall, n, with the interior of the glass-furnace, andhaving in front an openin g, m, for the admission of fuel. Within theglass-furnace, and separated by the walls at from the fire-place G, isbuilt an air-chamber, I, communicating through a passage or passages, p,with a pit, J, formedbeneath the base of the furnace, and communicatingwith the interior of the furnace through holes or a, which are on alevel, or nearly so, with the bench at. The interior of the furnacecommunicates with the stack F through the usual angular flues 3 formedat the edges of the working-holes f.

The products of combustion, after reaching the interiorof the furnace,are dispersed in every direction, and are consequently brought to bearon the whole of the pots in their attempts to escape to the numerousfiues 3 As the products of combustion, however, enter the furnace, theyare met by numerous jets of heated air escaping through the openings at,and these jets of heated air tend to ignitethe unconsumed products ofcombustion, so that a clear flame of intense heat pervades the wholeinterior of the furnace.

The chamber 1 is supplied with air, through the passage or passages 10,from the pit J, which is made of considerable length in order to producea draft, and as the air, before passing from the said chamber throughthe apertures as into the furnace, is considerably heated, it

will have no tendency to chill and crack the .pots. If a pot shouldbecome burnt out or broken, the molten glass from the same would flowthrough the apertures .12 into the chamber I, from which the whole couldbe withdrawn through an opening, 3 communicating with the cave, and theglass thus saved would be but slightly deteriorated, as the interior ofthe furnace can be kept comparatively clean and free from cinders.

We claim as our invention- 1. The combination, in a glass-furnace, of anexterior fire-place or fire-places and openin gs a, through which heatedair is introduced into the interior of the furnace, substantially asdescribed.

2. The chamber I, arranged above the ashpit and below the floor of thefurnace, and communicating with the latter, as and for the purpose setforth.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

FREDERICK ROHRBAOHER. FERDINAND HORMANN. Witnesses:

WM. A. STEEL, HARRY W. DoUTY.

